Stop motion for drawing frames



w; .1.. SCOTT 1,761,413

STOP MOTION FOR DRAWING FRAMES June 3, 1930.

Filed April 19, 1928 2 Sheets-S1169?l 1 A A. Y'

l 1 f4; I L.

A TTORNE YS.

June 3,B 1930.1

W. J. SCOTT sToP'MoTIoN FOR DRAWING FRAMES Filed 'April 19, 1928 2 Sheets-Sheet 2 fr K/L/ l, 1

A TT ORNEYS.

Patented June 3, 1930 TES PATENT OFFICE WALTER ."r'. scor'rQoF WooNsocKEnRHonn ISLAND STOPMOTION FOR SDRAM/'INGV FRAMES Appncatian, mea April 19,

l rlhis invention relates to an improved stop motion fordrawing frames and has for its object to provide in such a stop motion an electric circuit controlled by a feeler member located between the draft rolls and the bobbn and on which the roving is wound whereby a building up ofa surplusage of roving on the spindle will affect a movement of the circuit controlling member to stop the machine. i A further objectief the invention is to locate one or more flexible circuit closing members at a point adjacent the upper end ofthe spindle Vso that if for any reasonV ak surplus amount of roving led-from :the draft rolls is built up'upon the spindlethis surplus stock will cause action of said circuit closing members to stop the machine. i Y

lViththese and other objects in view, the invention consists ofcertain novel features y of construction, as will be more fully yde- :3.0 Vand the-buildingup of the roving about the spindle tofoperate the circuit closing device. a

.Figure 3 is a view ofthe under sideof one form of circuit closen,

une i Fig- Figure t is a section ,on ure 3. i i j .a

Figure 5 is a section Online 55 of Fig;V ure3. A v i p Figure 6 isa section online 6-6 'ofhFigJ ure3. F p u 4,0 f Figure 7 is a sidev view partly in section illustrating the tripping mech'anismlfor rej-v leasing thebelt shift lever. i n Figure 8 vis a ydiagrammatic view showing the wiring'diagram `in connection with the circuit closingmember and the tripping 1928. Serial No. 271,155. f

mechanism in the circuit for shifting the belt from the tight to the loose pulley.

It is found in practice that in operating drawing frames, more particularly worsted drawing frames, that after the stock is led from the draft rolls down thru the hollow spindle to be laid by the flyer upon the traversing bobbin that in some instances, the bobbin does not drag sufliciently and so permits the roving to'lnn ahead and become slack to such an extent that it is wound about andbunched on the end of the spindle and also in other instances the roving becomes broken at some point intermediate the draft rolls and the point where it is' Wound onto the bobbin, in which case the roving as it continues to be fed from the draft rolls is usually caught and-wound about the upper end of the revolving spindle, sometimes above and sometimes below the spindle support or bearing whereby considerable stock is wasted. To obviate this diiiculty, I have mounted a soca'lled feeler member adjacent the upper end ofthe spindle at the point where itusually bunches about the spindle head, whereby this launchingy effect serves to `operate the mechanism for stopping the machineand the following is a detailed description of the present embodiment of my invention and showing one means by which these advantageous results may be accomplished:

lVith reference to the drawings, 10 desig nates the draft rolls and 11 is the spindle which is rapidly revolved by the belt 12 from the pulley 18. .The upper endof this type of spindle is formed hollow, as best illustratedat 14, in FigureQ, and this upper end is provided with a bearing 15 in the rail 16'.A

Below this tubular portion of the spindle is mounted a guide eye 17 and a flyer 18 which provided with a guide 19.

From thev draft rolls 10 `the roving isled down thrul the hollenT portion ofthe spindle, thru the guideejfe'l'? and down thru the-eye '19' inV the flyer bywhich it is laid upon the bobbin 2l which is mounted on the spindle. This bobbin rests upon the felt washer carried by the traverse rail 23 so as to exert a friction on the bobbin to prevent it from a too rapid rotation and to cause a certain amount of tension on the roving as laid thereon. This rail 23 is moved up and down by the rack Q4 and pinion Q5 to give the necessary traverse motion to the bobbin.

It is often found that the roving breaks down somewhere between the draft rolls and the point where it is laid upon the bobbin and in other instances it is found that the bobbin is not proifiding suilicient tension on the roving and in either of these cases the loose portion of this roving is permitted to be wound about the rapidly travelling spindle and in most instances it will become wound about the upper end 26 of the spindle head at the point a, and in some instances it will also extend around beneath the bearing l5 and build up at the point B below the bearing.

In order to stop the machine when the rovf ing begins to bui ld up on this spindle, I have placed a circuit closing member 2T which I support upon this rail I6. This circuit closure preferably provided with two flexible feeler lingers 28 which are herein shown as being normally out of contact with their posts 2,9, and these posts 29 are connected together thru the connector Bl and are connected in the circuit thru the wires 32, the closing of which circuit energizes the solenoid magnet 33 to withdraw the latch Bil and release the lever 35 which under action of tho spring 36 moves the belt shift 37 to carry the belt from the tight pulley 38 to the loose pulley 39.

By this construction it will be seen that soon as the roving breaks or becomes sufliciently loose it will build up about the upper end of the spindle that this built up portion of the roving engages one or bothA of these feeler contact fingers 28 to press them into contact' with terminal 29 to close the circuit and stop the machine.

I do not wish to be restricted to the use of'an open electric circuit through which to stop the machine as in some instances a closed circuit may be employed for this purpose.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being delined and limited only by the terms of the appended claims. l

I claim l. In a stop motion for drawing frames, a set of draft rolls, a, hollow7 spindle thru which the roving is led to be laid upon the bobbin,

Aa support for the upper end of said spindle,

guiding means carried by the spindle for laying the roving onto the bobbin as fed fromV said rolls, an electric circuit, a circuit control device carried by said spindle support havino' a flexible circuit control member whereby the building up of surplus roving on the spindle at a point adjacent said closure member will move the same to atl'ect the circuit and stop the machine.

2. In a stop motion for drawing frames, a set of draft rolls, a roving package, a rotat able spindle, carrying means for laying the roving on the package, an upper support -tor the spindle thru which the upper end portion of the spindle extends, an electric circuit, circuit-control devices positioned both above and below said spindle support and arranged to be affected by the building up ot a surplusage of roving either above or below the support to stop the machine.

In a stop motion for drawing frames, a set of draft rolls, a hollow spindle thru which the roving is led to be laid upon the bobbin, a support for the upper end of said spindle, guiding means carried by the spindle for laying the roving onto the bobbin as fed from said rolls, an electric circuit, a circuit control device carried by said spindle support having a contact member and a flexible arm both in said circuit, said arm extending in a direction at a right angle to the axis of said spindle and normally spaced from said contact, whereby the building up of a surplusage ot roving on said spindle at a point adjacent said support will engage and move said arm in to engagement with said contact to close the circuit and stop the machine.

4. In a stop motion for drawing frames, a set of draft rolls, a spindle, a rotatable meinber for laying the roving onto a bobbin as fed from said rolls, an electric circuit, and a flexible movable stop member laterally displaceable in relation to said spindle and spaced therefrom and in position to be engaged and moved by building up of the roving radially on said spindle, to stop the machine.

-5. In a stop motion for drawing frames, a set of draft rolls, a spindle having a head portion, a rotatable member for laying the roving onto a bobbin as fed from said rolls, an electric circuit, and a removable circuit closing feeler member late 'ally disposed in relation to said spindle and spaced therefrom and in' osition to be engaged and moved by building up of the roving on said spindle head portion at either end thereof to close the circuit and stop the machine.

K 6. In a stop motion for drawing frames, a set of draft rolls, a spindle having a head portion and on which the winding bobbin is supported, a support for the upper end of the spindle adjacent the draft rolls, an electric circuit, a movable circuit closure feeler mem- 'ber in said circuit laterally disposed in relation to said spindle and spaced therefrom to be engaged and movedto close the circuit and `stop the machine by a building up of a surplus of the material upon the lowerl end of the spindle head portion.

7. In a stop motion for drawing frames, a set of draft rolls, a hollouT spindle through which theroving from said rolls is led to be Wound upon a bobbin, a normally open electric circuit, a flexible circuit closure' feeler member in said circuit laterally movable in relation to said spindle and spaced therefrom to be engaged and moved to close the circuit and stop the machine when a surplusage oi' the roving is built up radially upon 'the Spindle adjacent its uppel1 end.V

In testimony Whereof'I affix my signature.

VALTER J. SCOTT. 

